Phillips Petroleum Company

Phillips Petroleum Company Washington County

Nancy W Eilerts

Max P McDaniel

Gil R Hawley

Kathy S Collins

Lloyd W Guatney

M Bruce Welch

Bryan E Hauger

Harold R Deck

Novel catalyst systems which comprise one or more diimine nickel(II) or palladium (II) complexes, one or more cocatalysts, and aluminophosphate are disclosed. Olefin polymerization processes using those catalyst systems are also disclosed. The inclusion of aluminophosphate can improve the activity or productivity of such catalyst systems, making such catalyst systems active or more active in olefin polymerization under conditions in which they had previously been inactive or insufficiently active.

Effect of aluminophosphate on catalyst systems comprising metal alkyl cocatalysts

Novel catalyst systems which comprise diimine nickel complexes comprising additional ligands selected from the group consisting of acetylacetonate, hexaflourylacetylacetonate, halogens and mixtures thereof can be used with methylaluminoxane in slurry polymerization processes to polymerize mono-1-olefins and, optionally one or more higher mono-1-olefin comonomer(s), to produce high molecular weight polymers.

Polymerization catalysts and processes therefor

Novel catalyst systems which comprise one or more diimine nickel (II) or palladium (II) complexes, one or more cocatalysts, and aluminophosphate are disclosed. Olefin polymerization processes using those catalyst systems are also disclosed. The inclusion of aluminophosphate can improve the activity or productivity of such catalyst systems, making such catalyst systems active or more active in olefin polymerization under conditions in which they had previously been inactive or insufficiently active.

Novel catalyst systems which comprise at least two diimine nickel complexes can be used with a co-catalyst such as methylaluminoxane in polymerization processes to produce polymers having multimodal molecular weight distributions. Also disclosed are the novel polymers obtained by the use of such catalyst systems.

Polymer having a multimodal molecular weight distribution made from two different dimine catalysts

Novel catalyst systems which comprise pyridine-2-carboxaldimine nickel complexes can be used with methylaluminoxane in slurry polymerization processes to polymerize mono-1-olefins and, optionally a higher alpha-olefin comonomer, to produce low molecular weight polymers.

Polymerization catalysts and process therefor

A process is provided to prepare polyolefins having a multimodal molecular weight distribution comprising contacting at least one mono-1-olefin in a polymerization zone, under polymerization conditions, with a dual catalyst system comprising a first catalyst system which comprises a metallocene catalyst and a cocatalyst and a second catalyst system which comprises diimine nickel complexes which further comprise additional ligands selected from the group consisting of &prop;-deprotoned-&bgr;-diketones, &prop;-deprotoned-&bgr;-ketoesters, halogens and mixtures thereof. The resultant, recovered polymer has at least a bimodal, or broad, molecular weight distribution.

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Bartlesville, OK, United States of America

Nancy W Eilerts